ISSUE-75: clarify use of optional feature/extension [DFXP 1.0 (Editorial)]
http://www.w3.org/AudioVideo/TT/tracker/issues/75
Raised by: David Kirby
On product: DFXP 1.0 (Editorial)
3) The text in 7.1.1
"If a TT AF document instance makes use of an optional language..." -
this would benefit from mentioning that the mandatory and optional
features are detailed in E2 - Feature Support